APA citiranje

Hardy, P., & Brocklehurst, P. (2015). Evaluation of the effects of an offer of an incentive on the rate of questionnaire return: A nested RCT. Trials.

Citação norma Chicago

Hardy, Pollyanna, and Peter Brocklehurst. "Evaluation of the Effects of an Offer of an Incentive On the Rate of Questionnaire Return: A Nested RCT." Trials 2015.

MLA citiranje

Hardy, Pollyanna, and Peter Brocklehurst. "Evaluation of the Effects of an Offer of an Incentive On the Rate of Questionnaire Return: A Nested RCT." Trials 2015.